/*
 * Copyright 1999-2018 Alibaba Group Holding Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.nacos.naming.misc;

import com.alibaba.fastjson.JSON;
import com.alibaba.nacos.naming.boot.RunningConfig;
import com.ning.http.client.AsyncCompletionHandler;
import com.ning.http.client.Response;
import org.apache.commons.lang3.StringUtils;

import java.net.HttpURLConnection;
import java.util.HashMap;
import java.util.Map;

/**
 * @author nacos
 */
public class ServiceStatusSynchronizer implements Synchronizer {
    @Override
    public void send(final String serverIP, Message msg) {
        if (serverIP == null) {
            return;
        }

        Map<String, String> params = new HashMap<String, String>(10);

        params.put("statuses", msg.getData());
        params.put("clientIP", NetUtils.localServer());


        String url = "http://" + serverIP + ":" + RunningConfig.getServerPort() +
            RunningConfig.getContextPath() +
            UtilsAndCommons.NACOS_NAMING_CONTEXT + "/service/status";

        if (serverIP.contains(UtilsAndCommons.IP_PORT_SPLITER)) {
            url = "http://" + serverIP + RunningConfig.getContextPath() +
                UtilsAndCommons.NACOS_NAMING_CONTEXT + "/service/status";
        }

        try {
            HttpClient.asyncHttpPostLarge(url, null, JSON.toJSONString(params),
                new AsyncCompletionHandler() {
                    @Override
                    public Integer onCompleted(Response response) throws Exception {
                        if (response.getStatusCode() != HttpURLConnection.HTTP_OK) {
                            Loggers.SRV_LOG.warn("[STATUS-SYNCHRONIZE] failed to " +
                                "request serviceStatus, " + "remote server: {}", serverIP);
                            return 1;
                        }
                        return 0;
                    }
                });
        } catch (Exception e) {
            Loggers.SRV_LOG.warn("[STATUS-SYNCHRONIZE] failed to request serviceStatus," +
                " remote server: " + serverIP, e);
        }
    }

    @Override
    public Message get(String serverIP, String key) {
        if (serverIP == null) {
            return null;
        }

        Map<String, String> params = new HashMap<>(10);

        params.put("key", key);

        String result;
        try {
            if (Loggers.SRV_LOG.isDebugEnabled()) {
                Loggers.SRV_LOG.debug("[STATUS-SYNCHRONIZE] sync service status from: {}, " +
                    "service: {}", serverIP, key);
            }
            result = NamingProxy.reqAPI(RunningConfig.getContextPath()
                    + UtilsAndCommons.NACOS_NAMING_CONTEXT + "/instance/" + "statuses",
                params, serverIP);
        } catch (Exception e) {
            Loggers.SRV_LOG.warn("[STATUS-SYNCHRONIZE] Failed to get service status from " +
                serverIP, e);
            return null;
        }

        if (result == null || result.equals(StringUtils.EMPTY)) {
            return null;
        }

        Message msg = new Message();
        msg.setData(result);

        return msg;
    }
}
